apps/dsa.c

   1 /* apps/dsa.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef NO_DSA
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #include <time.h>
  64 #include "apps.h"
  65 #include <openssl/bio.h>
  66 #include <openssl/err.h>
  67 #include <openssl/dsa.h>
  68 #include <openssl/evp.h>
  69 #include <openssl/x509.h>
  70 #include <openssl/pem.h>
  71
  72 #undef PROG
  73 #define PROG    dsa_main
  74
  75 /* -inform arg  - input format - default PEM (one of DER, NET or PEM)
  76  * -outform arg - output format - default PEM
  77  * -in arg      - input file - default stdin
  78  * -out arg     - output file - default stdout
  79  * -des         - encrypt output if PEM format with DES in cbc mode
  80  * -des3        - encrypt output if PEM format
  81  * -idea        - encrypt output if PEM format
  82  * -text        - print a text version
  83  * -modulus     - print the DSA public key
  84  */
  85
  86 int MAIN(int argc, char **argv)
  87         {
  88         int ret=1;
  89         DSA *dsa=NULL;
  90         int i,badops=0;
  91         const EVP_CIPHER *enc=NULL;
  92         BIO *in=NULL,*out=NULL;
  93         int informat,outformat,text=0,noout=0;
  94         int pubin = 0, pubout = 0;
  95         char *infile,*outfile,*prog;
  96         char *passin = NULL, *passout = NULL;
  97         int modulus=0;
  98
  99         apps_startup();
 100
 101         if (bio_err == NULL)
 102                 if ((bio_err=BIO_new(BIO_s_file())) != NULL)
 103                         BIO_set_fp(bio_err,stderr,BIO_NOCLOSE|BIO_FP_TEXT);
 104
 105         infile=NULL;
 106         outfile=NULL;
 107         informat=FORMAT_PEM;
 108         outformat=FORMAT_PEM;
 109
 110         prog=argv[0];
 111         argc--;
 112         argv++;
 113         while (argc >= 1)
 114                 {
 115                 if      (strcmp(*argv,"-inform") == 0)
 116                         {
 117                         if (--argc < 1) goto bad;
 118                         informat=str2fmt(*(++argv));
 119                         }
 120                 else if (strcmp(*argv,"-outform") == 0)
 121                         {
 122                         if (--argc < 1) goto bad;
 123                         outformat=str2fmt(*(++argv));
 124                         }
 125                 else if (strcmp(*argv,"-in") == 0)
 126                         {
 127                         if (--argc < 1) goto bad;
 128                         infile= *(++argv);
 129                         }
 130                 else if (strcmp(*argv,"-out") == 0)
 131                         {
 132                         if (--argc < 1) goto bad;
 133                         outfile= *(++argv);
 134                         }
 135                 else if (strcmp(*argv,"-passin") == 0)
 136                         {
 137                         if (--argc < 1) goto bad;
 138                         passin= *(++argv);
 139                         }
 140                 else if (strcmp(*argv,"-envpassin") == 0)
 141                         {
 142                         if (--argc < 1) goto bad;
 143                         if(!(passin= getenv(*(++argv))))
 144                                 {
 145                                 BIO_printf(bio_err,
 146                                  "Can't read environment variable %s\n",
 147                                                                 *argv);
 148                                 badops = 1;
 149                                 }
 150                         }
 151                 else if (strcmp(*argv,"-envpassout") == 0)
 152                         {
 153                         if (--argc < 1) goto bad;
 154                         if(!(passout= getenv(*(++argv))))
 155                                 {
 156                                 BIO_printf(bio_err,
 157                                  "Can't read environment variable %s\n",
 158                                                                 *argv);
 159                                 badops = 1;
 160                                 }
 161                         }
 162                 else if (strcmp(*argv,"-passout") == 0)
 163                         {
 164                         if (--argc < 1) goto bad;
 165                         passout= *(++argv);
 166                         }
 167                 else if (strcmp(*argv,"-noout") == 0)
 168                         noout=1;
 169                 else if (strcmp(*argv,"-text") == 0)
 170                         text=1;
 171                 else if (strcmp(*argv,"-modulus") == 0)
 172                         modulus=1;
 173                 else if (strcmp(*argv,"-pubin") == 0)
 174                         pubin=1;
 175                 else if (strcmp(*argv,"-pubout") == 0)
 176                         pubout=1;
 177                 else if ((enc=EVP_get_cipherbyname(&(argv[0][1]))) == NULL)
 178                         {
 179                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 180                         badops=1;
 181                         break;
 182                         }
 183                 argc--;
 184                 argv++;
 185                 }
 186
 187         if (badops)
 188                 {
 189 bad:
 190                 BIO_printf(bio_err,"%s [options] <infile >outfile\n",prog);
 191                 BIO_printf(bio_err,"where options are\n");
 192                 BIO_printf(bio_err," -inform arg     input format - DER or PEM\n");
 193                 BIO_printf(bio_err," -outform arg    output format - DER or PEM\n");
 194                 BIO_printf(bio_err," -in arg         input file\n");
 195                 BIO_printf(bio_err," -passin arg     input file pass phrase\n");
 196                 BIO_printf(bio_err," -envpassin arg  environment variable containing input file pass phrase\n");
 197                 BIO_printf(bio_err," -out arg        output file\n");
 198                 BIO_printf(bio_err," -passout arg    output file pass phrase\n");
 199                 BIO_printf(bio_err," -envpassout arg environment variable containing output file pass phrase\n");
 200                 BIO_printf(bio_err," -des            encrypt PEM output with cbc des\n");
 201                 BIO_printf(bio_err," -des3           encrypt PEM output with ede cbc des using 168 bit key\n");
 202 #ifndef NO_IDEA
 203                 BIO_printf(bio_err," -idea           encrypt PEM output with cbc idea\n");
 204 #endif
 205                 BIO_printf(bio_err," -text           print the key in text\n");
 206                 BIO_printf(bio_err," -noout          don't print key out\n");
 207                 BIO_printf(bio_err," -modulus        print the DSA public value\n");
 208                 goto end;
 209                 }
 210
 211         ERR_load_crypto_strings();
 212
 213         in=BIO_new(BIO_s_file());
 214         out=BIO_new(BIO_s_file());
 215         if ((in == NULL) || (out == NULL))
 216                 {
 217                 ERR_print_errors(bio_err);
 218                 goto end;
 219                 }
 220
 221         if (infile == NULL)
 222                 BIO_set_fp(in,stdin,BIO_NOCLOSE);
 223         else
 224                 {
 225                 if (BIO_read_filename(in,infile) <= 0)
 226                         {
 227                         perror(infile);
 228                         goto end;
 229                         }
 230                 }
 231
 232         BIO_printf(bio_err,"read DSA key\n");
 233         if      (informat == FORMAT_ASN1) {
 234                 if(pubin) dsa=d2i_DSA_PUBKEY_bio(in,NULL);
 235                 else dsa=d2i_DSAPrivateKey_bio(in,NULL);
 236         } else if (informat == FORMAT_PEM) {
 237                 if(pubin) dsa=PEM_read_bio_DSA_PUBKEY(in,NULL, NULL, NULL);
 238                 else dsa=PEM_read_bio_DSAPrivateKey(in,NULL,PEM_cb,passin);
 239         } else
 240                 {
 241                 BIO_printf(bio_err,"bad input format specified for key\n");
 242                 goto end;
 243                 }
 244         if (dsa == NULL)
 245                 {
 246                 BIO_printf(bio_err,"unable to load Key\n");
 247                 ERR_print_errors(bio_err);
 248                 goto end;
 249                 }
 250
 251         if (outfile == NULL)
 252                 BIO_set_fp(out,stdout,BIO_NOCLOSE);
 253         else
 254                 {
 255                 if (BIO_write_filename(out,outfile) <= 0)
 256                         {
 257                         perror(outfile);
 258                         goto end;
 259                         }
 260                 }
 261
 262         if (text)
 263                 if (!DSA_print(out,dsa,0))
 264                         {
 265                         perror(outfile);
 266                         ERR_print_errors(bio_err);
 267                         goto end;
 268                         }
 269
 270         if (modulus)
 271                 {
 272                 fprintf(stdout,"Public Key=");
 273                 BN_print(out,dsa->pub_key);
 274                 fprintf(stdout,"\n");
 275                 }
 276
 277         if (noout) goto end;
 278         BIO_printf(bio_err,"writing DSA key\n");
 279         if      (outformat == FORMAT_ASN1) {
 280                 if(pubin || pubout) i=i2d_DSA_PUBKEY_bio(out,dsa);
 281                 else i=i2d_DSAPrivateKey_bio(out,dsa);
 282         } else if (outformat == FORMAT_PEM) {
 283                 if(pubin || pubout)
 284                         i=PEM_write_bio_DSA_PUBKEY(out,dsa);
 285                 else i=PEM_write_bio_DSAPrivateKey(out,dsa,enc,
 286                                                         NULL,0,PEM_cb, passout);
 287         } else {
 288                 BIO_printf(bio_err,"bad output format specified for outfile\n");
 289                 goto end;
 290                 }
 291         if (!i)
 292                 {
 293                 BIO_printf(bio_err,"unable to write private key\n");
 294                 ERR_print_errors(bio_err);
 295                 }
 296         else
 297                 ret=0;
 298 end:
 299         if (in != NULL) BIO_free(in);
 300         if (out != NULL) BIO_free(out);
 301         if (dsa != NULL) DSA_free(dsa);
 302         EXIT(ret);
 303         }
 304 #endif